. >>> at least 48 people are dead, more than 100 missing this morning after a major earthquake in guatemala, near the mexico border. the 7.4 magnitude quake triggered landslides and collapsed dozens of buildings. we'll have updates as news becomes available. >>> and medical news. new evidence that statins may not just help with heart disease but also with cancer. a study just released in "the new england journal of medicine," looked at cholesterol-fighting statins and found cancer patients taking them at the time of their diagnosis were 15% less likely to die from the disease. >>> and bargain-hunters are getting a bigger headstart this year, as walmart kicks off the holiday shopping season earlier than ever. the company says it will begin rolling out discounts at 8:00 thanksgiving night, opening two hours earlier than last year. >>> and now, here's our diane sawyer with a preview of tonight's "world news." good morning, diane. >> hello, josh. it's great saying good morning to you again. and the country's most powerful republican, house speaker john boehner, will give his first interview, af